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Home >> Infiniti >> 2012 >> FX35 AWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - DTCS P0441 Through P1168 >> DTC P0456: EVAP Control System >> DTC Logic >> DTC Confirmation Procedure
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DTC Confirmation Procedure

  1. INSPECTION START

    Will CONSULT be used?

    Will CONSULT be used? 

    YES: GO TO 2.

    NO: GO TO  4.

  2. PRECONDITIONING

    If DTC Confirmation Procedure has been previously conducted, always perform the following procedure before conducting the next test:

    1. Turn ignition switch OFF and wait at least 10 seconds.
    2. Turn ignition switch ON.
    3. Turn ignition switch OFF and wait at least 10 seconds.
      NOTE: After repair, check that the hoses and clips are installed properly.

      TESTING CONDITION: 

      • Open engine hood before conducting the following procedure: 
      • If any of following conditions are met just before the DTC confirmation procedure, leave the vehicle for more than 1 hour: 
        • Fuel filler cap is removed. 
        • Fuel is refilled or drained. 
        • EVAP component part/parts is/are removed. 
      • Before performing the following procedure, confirm that battery voltage is more than 11 V at idle: 
      • Check that EVAP hoses are connected to EVAP canister purge volume control solenoid valve properly. 

      : GO TO 3.

  3. PERFORM DTC CONFIRMATION PROCEDURE

    With CONSULT 

    1. Turn ignition switch ON and select "DATA MONITOR" mode with CONSULT.
    2. Check that the following conditions are met:

      FUEL LEVEL SE: 0.25 - 1.4 V 

      COOLAN TEMP/S: 0 - 32°C (32 - 90°F) 

      FUEL T/TMP SE: 0 - 35°C (32 - 95°F) 

      INT A/TEMP SE: More than 0°C (32°F) 

      If NG, turn ignition switch OFF and leave the vehicle in a cool place (soak the vehicle), or refill/drain fuel until the output voltage condition of the "FUEL LEVEL SE" meets within the range above and leave the vehicle for more than 1 hour. Then start from step  1.

    3. Turn ignition switch OFF and wait at least 10 seconds.
    4. Turn ignition switch ON.
    5. Select "EVP V/S LEAK P0456/P1456" of "EVAPORATIVE SYSTEM" in "DTC WORK SUPPORT" mode with CONSULT.

      Follow the instructions displayed.

      NOTE: If the engine speed cannot be maintained within the range displayed on CONSULT screen, go to "BASIC INSPECTION: SPECIAL REPAIR REQUIREMENT ".

      Which is displayed on CONSULT screen? 

      OK: INSPECTION END

      NG: Proceed to "DIAGNOSIS PROCEDURE ".

  4. PERFORM COMPONENT FUNCTION CHECK

    With GST 

    Perform component function check. Refer to "COMPONENT FUNCTION CHECK ".

    NOTE: Use component function check to check the overall function of the EVAP very small leak function. During this check, a 1st trip DTC might not be confirmed.

    Is the inspection result normal? 

    YES: INSPECTION END

    NO: Proceed to "DIAGNOSIS PROCEDURE ".